Period cramps normal in week 30???

Anaid • 🌹 • Lía Rose Flores • 🌹 03/20/18

I’m having some period cramps kind of intense but I don’t know if it’s normal or not. Any advice? Should I go to the ER? I’m 30 weeks pregnant and I’m at risk of preterm labor. I’ve been getting progesterone shots weekly and I had my first born at 28 weeks.